Acid-resistant roll



Aug. 15, 1944. E. w. SANDERS 2,356,007

ACID-RESISTANT ROLL Filed July 30, 1942 f 11111111111. III,

Patented Aug. 15, 1944 ACE-RESISTANT ROLL Edmond W. Sanders, CuyahogaFalls, Ohio, as-

signor to Wingfoot Corporation, Akron, Ohio, a

corporation of Delaware Application July 30, 1942, Serial No. 452,944

6 Claims. ((1 74-430.?)

This invention relates to guiding and supporting rolls and, moreparticularly, to idler rolls used in tanks where the rolls are eitherpartly or wholly submerged in a liquid containing acid as for example,in pickling tanks whereby sheet metal is cleansed in a bath containingacid or other reagent in preparation to being galvanized, tin plated orotherwise finished.

It has been found by past experiences that it is quite difficult toproduce a roll that would resist the attack of acid, and variousacid-resisting coverings were used which would soon come loose or due towear would expose the core or body of the roll to the attack of theacid. It is essential that a roll of this character be provided withouter covering of a resilient material to prevent marring, scratching orin any way defacing the surface of sheet metal being treated. otherwiseany marks impressed on the strip material passing over or under the rollwill show up after the plating is completed.

An object of this invention is to produce a roll having a resilientstrip contacting covering which extends over the entire surface of theroll body and provided with suitable acid-resisting clamping means tosecurely clamp the terminating edges of the resilient covering to theends of the body which will positively prevent any acid or other reagentreaching any part of the roll that would be deteriorated by suchcontact.

Another object of this invention is to provide a roll having thenecessary characteristics of a long-wearing resilient coveringvulcanized or otherwise attached toand covering the entire roll bodyincluding the end portions, and having acid-resisting sleeves of alloyedmetal attached to and covering the projecting spindles or shafts whichare capable of being drawn tightly against the terminating edges of theresilient covering by acid-resistant cap screws, and soft metallicwashers which act as gaskets to prevent the acidcontaining liquid fromcontacting any part of the roll beneath such coverings.

These and other objects will be apparent when consideration is given tothe following detailed description and the accompanying drawing andclaims in which one preferred form of the invention is embodied. In thedrawing:

Fig. 1 is a diagrammatic side view showing the roll in position in apickling tank;

Fig. 2 is a longitudinal sectional View of the roll;

Fig. 3 is an end view of the roll; and

Fig. 4 is a fragmentary sectional view through one end of a roll showinga slight modification of the end sealing arrangement.

Referring to Fig. l, the numeral l0 designates a tank of conventionalconstruction near one end of which is mounted a roll I l rotatable inbearings I 2 to guide a strip of material i3 into the tank. Near theother end a roll l4 mounted in bearings [5 guides the stri out of thetank. In the center of the tank Ill and near the bottom a roll itmounted in bearings l1 guides the strip from roll l2 through thecleaning or pickling solution and out of the bath to roll H. The rollindicated in its entirety by the numeral I6 is the subject of thisinvention and comprises a tubular metal body l8 having stub shafts orspindles l9 extending from its ends. These shafts or spindles I! areprovided with flanges 20 which are fitted into the ends of the tubularbody It and become the end portions of said tubular body and may besecured therein by welding or any other desired means. The tubular bodyis then covered with a resilient acid-proof covering 2| which may beformed of rubber or like material which is immune to acid or otherregent which may be used in this particular process, rubber beingpreferred because it is acid-resistant and adheres well to the surfaceof the metal body when vulcanized thereon. If a cover is merely cementedto the metal body, it has a tendency to separate therefrom which causesbulging and breaks soon appear which cannot readily be repaired,necessitating a new cover.

The neck portions or spindles l9 may be formed of any suitable metal andare covered by sleeves 22 which may be formed of a suitableacid-resistant alloyed metal and the spindles are provided with keyways23 and the sleeves are also provided with keyways 24 of the sameproportions and the spindles and sleeves are locked in rotatingrelationship by the keys 25. The inner ends of the sleeves are providedwith flanges 26, the inner end surfaces of which are provided withconcentric grooves 28 in order to provide a position seal when clampingthe terminating edges of the resilient covering against the ends of theroll body, said sleeve being drawn tight against said ends byacid-resistant cap screws 29 which screw into the tapped holes 30 in theends of the spindles l9. Acid-resistant lead washers 3| are providedunder the heads of the cap screws 29 to prevent acid or-other reagentsfrom contacting the inner surface of spindles or the roll body.

In. Fig. 4 this end seal is shown in a slightly modified form, the onlydifierence being in the arrangement of washers. Instead of the leadwashers under the cap screw heads. a rubberwasheruisusedasaseaiingmeanswhichhas placed over it acid-resistantmetallic washers a to take the thrust of the cap screw head.

From the foregoing description, it will be apparent that a rollconstructed in accordance with this invention comprising a resilientacid-proof body covering and spindles covered with acidproof alloyedmetal sealed in the manner described will be chemically inert to thecleaning or pickling bath or other corrosive reagent employed in aprocess of this nature, and will give long uninterrupted service.

Having thus fully illustrated and described. my invention, it will beobvious that modifications and changes may be made therein and I wish tobe limited only by the scope of the appended claims.

What I claim is:

1. A roll adapted to guide strip material through a liquid bathcomprising a substantially tubular body. spindles extending from theends of the body. each of said spindles having a flange on one end forsecurement to the tubular body, a rubber covering for said tubular body,said rubber covering extending over the ends of the body and embracingthe spindles with its terminating edges, acid-resisting sleeves attachedto said spindles, and acid-resisting clamping means to clamp theterminating edges of the rubber covering against the ends of the rollbody.

2. A roll for guiding and supporting a strip of material through a tankcontaining liquid comprising a hollow cylindrical body, having neckssecured in the ends thereof, a sheet of rubber extending over the entiresurface of said roll body and having terminating edges adapted'toembrace the extending neck portions, and acid-re-- sistant clampingmeans to clamp the terminating edges of the rubber covering against theends of the roll body.

3. A roll for guiding and supporting a strip of material through an acidpickling bath comprising:a cylindrical body, shafts extending from theends thereof, a rubbercovering extending over the surface of the roll',the terminating edges of said rubber covering embracing said shafts,acidresisting sleeves embracing and attached to said shafts, andacid-resisting clamping means to clamp the terminating edges of saidrubber covering against the ends of said body.

4. An acid-resisting roll for guiding and supporting a strip of sheetmaterial through an acid pickling bath, comprising a roll body havingshafts extending from the ends thereof, a rubher covering extending overthe entire surface of said roll body, and clamping means to clamp theterminating edges of said rubber covering against the ends of saidroll,- said clamping means comprising sleeves keyed to said shafts andadapted to be received in supporting bearings, said sleeves being drawnagainst the terminating edges of said rubber covering by acidresistingcap screws, and acid-resisting washers to prevent acid from entering theinner surface of said sleeve and roll body.

5. A roll for guiding and supporting strip material through an acidpickling bath comprising a tubular roll body having shafts securedtherein and extending from the ends thereof, an acid-resisting coveringextending over the surface of the roll, the terminating edges of saidcovering embracing said shafts and the ends of said roll body,acid-resisting sleeves covering said shafts and adapted to rotate insupporting bearings, and acid-resisting clamping means to draw the innerends of said sleeves against the terminating edges of saidacid-resisting covering to clamp said edges against the ends of the rollbody.

6. An acid-resisting roll comprising a cylindrical body portion,spindles secured in the ends thereof and extending substantially axiallyfrom the ends of said body portion, a molded relatively resilientacid-resistant covering for the body portion including integral endportions covering the ends of the body and extending to points adJacentthe spindles, and acid-resistant sleeves secured on the spindles andclamped in sealing relation against the terminating end portions of thecovering.

EDMOND W. SANDERS.

